IMac 8,1 won't boot after Lion Install.

Hey guys,
I have an iMac8,1 with a 2.4GHz Intel Core 2 Duo that I just installed Lion on.
It previously had Leopard on it, but after shutting it down to boot from the USB stick that I had made on my MacBook, I pressed alt to show the device selection menu. There were no options except EFI boot with an orange drive, which I took for the Lion stick that I had made. Installing Lion went without a hitch. I formatted the drive that Leopard was on and did a clean install. After it was finished, I set up Lion and set up a Boot Camp partition so that I could install Windows 7 side by side with it. I booted into the device selection menu (holding down alt/option while booting) and it showed me a completely blank screen. No Macintosh HD, no EFI boot, no Windows DVD, nothing.
I put the flash drive back into the machine, and kept restarting it and seeing the same result, until all of a sudden it decided to finally start, and I saw the Apple logo. After a while, though, it became apparent that it was not booting into OS X Lion on the hard drive, but rather the Lion Install.
I have no idea what to do with this machine. It was running extremely slowly before I started trying to fix it, and it didn't make sense to me that a machine with fairly capable specs (I have the same processor and 2GB of RAM on my MacBook and it runs great) would run so catastrophically slowly.
Also, I'm now in Disk Utility running from the Lion USB and it a) sees both partitions and mounts them fine, b) says that "The volume "Macintosh HD" appears to be OK", after Repair Disk c) is unable to fix or verify disk permissions.
I'm at a loss as to what to do. Can anyone help?

If you have backups of all OS X and WIndows data on the internal drive, I suggest you partition it with the default options (GUID partition table, one data partition) while booted from the USB device. Install OS X and test. If you can boot in that configuration, restore your OS X data and then run Boot Camp Assistant, if you wish.
If the above procedure is unsuccessful, the machine has a hardware fault.

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IMac won't boot after Lion install

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Now the computer won't boot up. It gets stuck at the grey screen with an Apple and a spinner at the bottom.
Please help; this computer runs my small business.

How much RAM is installed? Lion will run much better with at least 4 GBs of installed RAM.
I would guess you updated from Snow Leopard and that Snow Leopard was not in good shape. Reinstall Lion to see if this fixes things for you:
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Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alterhatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
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Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.

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Hello!
Today i formatted my entire disk, but made it Journaled, Encrypted. It installed (actually "downloaded aditional files"), and then booted with a cross/do not proceed sign. I booted from the install disk again, got an error telling me to reinstall OS X. I was never asked for my password, and when i started disk utility, the disk was locked.
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Thanks for this info:
Kappy wrote:
There may be many reasons why it didn't work but without knowing exactly what you did it's pretty difficult to make any presumptions.
Others use it, and there have not been too many posts about using encrypted disks and FileVault 2. But searching the forums may help you.
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But as ai said, i don't need it. I'm aleadry installing it normally.
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tigerswim, welcome to Apple Discussions.
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BTW - You are NOT addressing Apple here: http://discussions.apple.com/static/apple/tutorial/tou.html
We are just users like you trying to help others. You can send feedback directly to Apple via http://www.apple.com/feedback/macosx.html
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Message was edited by: EZ Jim

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Kimg wrote:
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Last edited by 097 (2014-07-10 22:20:23)

Actually, there already is an entry for Windows 7. It just doesn't work. Here it is:
### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows 7 (loader) (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-AC66E08666E0529E' {
insmod part_gpt
insmod ntfs
set root='hd0,gpt1'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1 AC66E08666E0529E
else
search --no-floppy --fs-uuid --set=root AC66E08666E0529E
fi
chainloader +1
### END /etc/grub.d/30_os-prober ###
Also, when I ran gdisk, it says this: Found valid GPT with protective MBR; using GPT.
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Thanks

Hi,
Locate your specific Model from the list on the link below.
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Regards,
DP-K
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IMac 8,1 won't boot after Lion Install.

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